catalogues and names

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names

catalogues and names

AX Vel, HD 68556, SAO 219549, CP -47 1944

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000)	RA: 8h 10min 49.355sec	DEC: -47° 41' 54.84''	±0.18 arcsec	source: 16
position (2000.72)	RA: 8h 10min 50sec	DEC: -47° 42' 3''	JD: 2451806.31
proper motion (J2000)	RA: -0.0002 arcsec/a	DEC: 0.008 arcsec/a		source: 16
galactic coord. (B1950)	longitude: 263.23°	latitude: -7.69°

magnitude:

visual	7.93 (observed)	source: 30
photovisual	8.2	source: 16

spectral information:

spectral class	F8		source: 96
Morgan-Keenan	F6II		source: 10
B-magnitude	8.82 ±0.015	B-V-magnitude	0.65
U-magnitude	9.25 ±0.02	U-B-magnitude	0.43

variability information:

source of data: 30

variability type	114
var. amplitude	0.55
var. period	2.59
var. epoch	2443878 4. January 1979, 12:00:00 UT
next max light	2451808.58 21. September 2000, 01:55:12 UT

sources:

10	Michigan Catalog of 2-Dimensional Spectral Types for the HD Stars, Volumes I-III
Houk, N., and A.P. Cowley, Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 1., (Zones -89 to -53 Degrees), Ann Arbor: The University of Michigan, 1975, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 2., (Zones -52 to -40 Degrees), Ann Arbor: The University of Michigan, 1978, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 3., (Zones -40 to -26 Degrees), Ann Arbor: The University of Michigan, 1982
16	PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
96	SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (B1950)	RA: 8h 9min 17.294sec	DEC: -47° 32' 56.47''	±0.072 arcsec
position (2000.72)	RA: 8h 10min 50sec	DEC: -47° 42' 2''	JD: 2451806.31
position (J2000)	RA: 8h 10min 49.198sec	DEC: -47° 41' 54.43''
proper motion B1950 (FK4)	RA: -0.0018 arcsec/a	DEC: 0.015 arcsec/a	±0.012 arcsec/a in RA ±0.012 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0013 arcsec/a	DEC: 0.016 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	8.6 (accuracy: 1 decimal)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".
photographic	8.8 (accuracy: 1 decimal)
source of photographic magnitude data	Taken from magnitudes of the CPD and diameters of the Cape Astrographic Catalogue

spectral information:

spectral class	F8
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	Cape Zone, catalogue number: 5491
Durchmusterung	CP-47 1944
Henry Draper Catalogue	68556

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 8h 9min 17.3sec

DEC: -47° 32' 56''

variability informations:

variability type	CEP(B)	pulsating variable star
magnitute at max. brightness	7.93
magnitute at min. brightness	8.48
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2443878.253 4. January 1979, 18:04:19 UT
period [d]	2.592891
next maximum light [JD]	2451807.313678 19. September 2000, 19:31:42 UT
rising time	42 % of period

spectral information

spectral class

F6II

references

to a study	Vol. III GCVS
to a chart/photograph	Vol. I GCVS (see Kholopov et al. 1985-1988)

miscanellous

ID in the GCVS catalogue	85/77
constellation	Vela
notes on existence	The star is equivalent to '0850078 AY'.
There are notes in published catalog.

variability type description

variability type

description

CEP(B)

Cepheids. Radially pulsating, high luminosity (classes Ib-II) variables with periods in the range of 1-135 days and amplitudes from several hundredths to 2 mag in V (in the B band, the amplitudes are greater). Spectral type at maximum light is F; at minimum, the types are G-K. The longer the period of light variation,the later is the spectral type. The maximum of the surface-layer expansion velocity almost coinciding with maximum light. CEP(B) Cepheids (TU Cas, V 367 Sct) displaying the presence of two or more simultaneously operating pulsation modes (usually the fundamental tone with the period P0 and the first overtone P1). The periods P0 are in the range from 2 to 7 days, with the ratio P1/P0 approx. 0.71.